Java: Type Casting

In Java, there are two types of casting:

• Widening Casting (automatically) - converting a smaller type to a larger type size
  byte -> short -> char -> int -> long -> float -> double
  

  int myInt = 9;
  double myDouble = myInt; // Automatic casting: int to double
  
  System.out.println(myInt);      // Outputs 9
  System.out.println(myDouble);   // Outputs 9.0

   

• Narrowing Casting (manually) - converting a larger type to a smaller size type
  double -> float -> long -> int -> char -> short -> byte

• double myDouble = 9.78d;
  int myInt = (int) myDouble; // Manual casting: double to int
  
  System.out.println(myDouble);   // Outputs 9.78
  System.out.println(myInt);      // Outputs 9